Case Study

Sully's Superette - Manchester, NH

Sully's Superette is a mid-sized supermarket serving the west side of Manchester,
NH.

The buildings major mechanical systems include:

Produce Cases

Service Meat & Deli Cases

Frozen Food Cases

Several Walk-in Coolers & Freezers

Heat Reclamation Unit

Store Air Conditioning

Gas Back-Up Furnaces

Lighting Control

The original project involved replacing the existing Tyler Refrigeration Control
Panel with an expanded Delta Turbo panel. Delta was chosen over Tyler, a large
supermarket supplier of refrigerated cases and compressors, based on price and
flexibility. While updating the equipment, management put forth some goals to
be accomplished:

Advanced Refrigeration of Hooksett, NH, Sully's refrigeration service company,
partnered with R. L. Shields Associates to install this equipment with a minimum
of downtime.

During installation, it was discovered that the old Tyler system used a different
type of thermistor sensor from what we were lead to believe. The flexibility
of the Delta system allowed us to change the thermistor curves to match the
sensors installed, saving many man-hours of work, unloading and load cases of
food.

The Delta system was interfaced with 2-alarm annunciators and the buildings
security system panel. During the day, the alarm annunciator sound if there
is a refrigeration problem, but at night, the alarm transmits directly to alarm
monitoring station who then notify the store management. If there is a after-hours
refrigeration alarm, the manager, who lives about 10 miles from the market,
can call into the system via modem to check the temperatures of the affected
case. Both the store workstation as well as the managers home PC have full color
graphics, to provide an easier to understand operator interface.

For more than the past three years, the Delta Controls system has performed
flawlessly. The only controls related problems have been 3 failed thermistor
sensors, and they were the original Tyler style sensors.